Total Synthesis of (±)-8-Oxo-erythrinine, (±)-8-Oxo-erythraline, and (±)-Clivonine
作者:Maomao He、Chunrong Qu、Bingbing Ding、Hao Chen、Yangyan Li、Guofu Qiu、Xianming Hu、Xuechuan Hong
DOI:10.1002/ejoc.201500265
日期:2015.5
Total syntheses of the erythrina alkaloids (±)-8-oxo-erythrinine and (±)-8-oxo-erythraline have been developed, based on a substrate-controlled intramolecular 6-exo-trig selective radical spirocyclization that establishes the quaternary center of the B-rings. An improved total synthesis of (±)-clivonine has also been reported, based on an intramolecular 6-endo-trig free-radical cyclization of a highly
基于底物控制的分子内 6-exo-trig 选择性自由基螺环化,已经开发了 erythrina 生物碱 (±)-8-oxo-erythrinine 和 (±)-8-oxo-erythraline 的全合成B 环。还报道了基于高度官能化烯酰胺的分子内 6-endo-trig 自由基环化和石蒜碱型中间体的仿生环开关的 (±)-clivonine 的改进全合成。这些内/外选择性序列使我们能够以经济的方式从一个共同的构建块中快速组装两种不同的复杂生物碱。